M4.3 Earthquake Near 69 km SSW of Kaktovik, Alaska Carries Provider Tsunami Flag
USGS Week reports M4.3 near 69 km SSW of Kaktovik, Alaska, with a 6.6 km catalog depth.
The event began at Tue, 15 Sep 2026 09:51:38 GMT. USGS Week reports magnitude 4.3, 6.6 km catalog depth, and coordinates 69.542, -144.230.
The catalog location label is 69 km SSW of Kaktovik, Alaska; no separate nearest-city field was supplied with this solution. By catalog depth, this is a shallow event. The magnitude-derived energy estimate is 1.78e+11 joules, or about 42.5 tons of TNT equivalent; that calculation describes source energy, not local damage.
The current catalog entry does not include a public felt-report count. Other attached observation fields include catalog significance score 284. No official casualty or damage statement is attached to the normalized event evidence.
The USGS Week catalog currently marks the solution as reviewed. No station-count, phase-count, residual, gap, or uncertainty fields were supplied in the normalized record. 1 alternate network solution is retained for comparison.
The provider record carries a tsunami-related flag. That field is not itself a warning; readers should check the issuing tsunami warning center and local officials. Magnitude, depth, and location can change as monitoring networks add observations and review the solution.
At a glance
- Magnitude 4.3
- 6.6 km catalog depth
- 1.78e+11 J magnitude-derived energy estimate
- Origin: Tue, 15 Sep 2026 09:51:38 GMT
- No felt-report count supplied
- USGS Week monitoring record